/Engine/Plugins/Runtime/XRBase/Source/XRBase/Public/XRMotionControllerBase.h
Original GetControllerOrientationAndPosition signature for backwards compatibility. They are pure virtual because a legacy plugin must implement them and public because a legacy vr plugin could use them internally.
bool GetControllerOrientationAndPosition ( const int32 ControllerIndex, const EControllerHand DeviceHand, FRotator & OutOrientation, FVector & OutPosition, float WorldToMetersScale ) const